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Tang H, Porras G, Brown MM, Chassagne F, Lyles JT, Bacsa J, Horswill AR, Quave CL. Triterpenoid acids isolated from Schinus terebinthifolia fruits reduce Staphylococcus aureus virulence and abate dermonecrosis. Sci Rep 2020; 10:8046. [PMID: 32415287 PMCID: PMC7229044 DOI: 10.1038/s41598-020-65080-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 04/28/2020] [Indexed: 02/06/2023] Open
Abstract
Staphylococcus aureus relies on quorum sensing to exert virulence to establish and maintain infection. Prior research demonstrated the potent quorum sensing inhibition effects of "430D-F5", a refined extract derived from the fruits of Schinus terebinthifolia, a medicinal plant used for the traditional treatment of skin and soft tissue infections. We report the isolation and identification of three compounds from 430D-F5 that reduce virulence and abate dermonecrosis: 3-oxo-olean-12-en-28-oic acid (1), 3-oxotirucalla-7,24Z-dien-26-oic acid (2) and 3α-hydroxytirucalla-7,24 Z-dien-27-oic acid (3). Each compound inhibits all S. aureus accessory gene regulator (agr) alleles (IC50 2-70 μM). Dose-dependent responses were also observed in agr-regulated reporters for leucocidin A (lukA, IC50 0.4-25 μM) and glycerol ester hydrolase or lipase (gehB, IC50 1.5-25 μM). Surprisingly, dose-dependent activity against the nuclease reporter (nuc), which is under the control of the sae two-component system, was also observed (IC50 0.4-12.5 μM). Compounds 1-3 exhibited little to no effect on the agr-independent mgrA P2 reporter (a constitutive promoter from the mgrA two-component system) and the esxA reporter (under control of mgrA). Compounds 1-3 inhibited δ-toxin production in vitro and reduced dermonecrosis in a murine in vivo model. This is the first report of triterpenoid acids with potent anti-virulence effects against S. aureus.
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Affiliation(s)
- Huaqiao Tang
- Center for the Study of Human Health, Emory University College of Arts and Sciences, 30322, Atlanta, Georgia, USA
- Department of Pharmacy, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Gina Porras
- Center for the Study of Human Health, Emory University College of Arts and Sciences, 30322, Atlanta, Georgia, USA
| | - Morgan M Brown
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Francois Chassagne
- Center for the Study of Human Health, Emory University College of Arts and Sciences, 30322, Atlanta, Georgia, USA
| | - James T Lyles
- Center for the Study of Human Health, Emory University College of Arts and Sciences, 30322, Atlanta, Georgia, USA
| | - John Bacsa
- X-ray Crystallography Center, Emory University College of Arts and Sciences, Atlanta, GA, 30322, USA
| | - Alexander R Horswill
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Cassandra L Quave
- Center for the Study of Human Health, Emory University College of Arts and Sciences, 30322, Atlanta, Georgia, USA.
- Department of Dermatology, Emory University School of Medicine, Atlanta, 30322, GA, USA.
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Romero Bhathal J, Chassagne F, Levitt M, Geindreau C, Aliseda A. Characterization of the porosity distribution and gradients in intracranial aneurysms treated with coils. Comput Methods Biomech Biomed Engin 2019. [DOI: 10.1080/10255842.2020.1714995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | - F. Chassagne
- Dpt. of Mechanical Engineering, University of Washington, Seattle, WA, USA
| | - M. Levitt
- Dpt. of Mechanical Engineering, University of Washington, Seattle, WA, USA
- Dpt. of Neurological Surgery, University of Washington, Seattle, WA, USA
| | - C. Geindreau
- Univ. Grenoble Alpes, CNRS, Grenoble INP, 3SR, Grenoble, France
| | - A. Aliseda
- Dpt. of Mechanical Engineering, University of Washington, Seattle, WA, USA
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Chassagne F, Convert R, Molimard J, Badel P. Combined experimental and numerical approach for the assessment of pressure generated by elastic compression bandage. Comput Methods Biomech Biomed Engin 2014; 17 Suppl 1:166-7. [PMID: 25074217 DOI: 10.1080/10255842.2014.931646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- F Chassagne
- a LGF, UMR 5307, École Nationale Supérieure des Mines, CIS-EMSE, CNRS , Saint-Étienne , France
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Chassagne F, Bessiere M, Calvayrac Y, Cenedese P, Lefebvre S. X-ray diffuse scattering investigation of different states of local order in Ni-Al solid solutions. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0001-6160(89)90030-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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